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Bimetallic Au-Cu/CeO$_{2}$ catalyst: Synthesis, structure, and catalytic properties in the CO preferential oxidation

Content Provider	Springer Nature Link
Author	Potemkin, D. I. Snytnikov, P. V. Semitut, E. Yu. Plyusnin, P. E. Shubin, Yu. V. Sobyanin, V. A.
Copyright Year	2014
Abstract	The preparation of bimetallic Au-Cu catalysts via the decomposition of the double complex salt [Au(en)$_{2}$]$_{2}$[Cu(C$_{2}$O$_{4}$)$_{2}$]$_{3}$ · 8H$_{2}$O is considered. It is found that this method of preparation allows us to selectively obtain Au$_{0.4}$Cu$_{0.6}$ solid solution nanoparticles on the surface of a support. The composition of the particles corresponds to the stoichiometry of the double complex salt. The properties of bimetallic Au-Cu/CeO$_{2}$ catalyst and monometallic Au/CeO$_{2}$ and Cu/CeO$_{2}$ catalysts were studied during the preferential oxidation of CO in a mixture containing CO$_{2}$ and H$_{2}$O. The experiments were performed in a catalytic flow system within a temperature range of 50–250°C with a mixture of the following composition, vol %: CO, 1; O$_{2}$, 0.6; H$_{2}$O, 10; CO$_{2}$, 20; H$_{2}$, 60; and the balance, He. The weight hourly space velocity (WHSV) was 276000 cm$^{3}$/(g h). The bimetallic catalyst made it possible to oxidize a considerably larger amount of CO with higher selectivity with CO$_{2}$ and H$_{2}$O in the mixture, relative to the monometallic catalysts. The preferential oxidation of carbon monoxide in the presence of hydrogen is a promising method for the deep purification of hydrogen-containing gas mixtures in order to remove carbon monoxide. The purified hydrogen-containing gas can be used to feed portable power units based on low-temperature proton-exchange membrane fuel cells, for the synthesis of ammonia, and for hydrogenation in fine organic synthesis.
Starting Page	36
Ending Page	43
Page Count	8
File Format	PDF
ISSN	20700504
Journal	Catalysis in Industry
Volume Number	6
Issue Number	1
e-ISSN	20700555
Language	English
Publisher	Springer US
Publisher Date	2014-04-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bimetallic catalysts Au-Cu catalysts gold-copper catalysts double complex salts catalyst preparation CO removal preferential oxidation of CO hydrogen generation Catalysis
Content Type	Text
Resource Type	Article
Subject	Catalysis

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